@emmanuel: "Dear all,
TBlobField can store all kind of data, eg: jpg, gif, doc
but how can I know what kind of data stored in the TBlobField?
Emmanuel"
    @jjeffman: "Hello Emmanuel,
When you store a file in a "BLOB" field you load the file as a stream =
into the field, so if you can open the file and check if it is of the =
correct type you can also check if the blob is from any type. You only =
need to have documentation on the files you are working with. So you =
should ask Microsoft for a way of identify if a certain file is a MS =
Word file or not and so on. Search the Internet for ways of identify the =
files you will work with.
HTH
Jayme.
"Emmanuel" <email_address> wrote in message =
news:<email_address>
<quote>"
    @noemail: "Hi Emmanuel.
Just a small suggestion if I may. Perhaps you can add an extra field to the
database(can be small size 3 Alpha field) which you can use to store the
file extension before/after you stream the file to the blob field. You can
use the VCL ExtractFileExt function to get the file extention from the
file's path name."
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